Water Pump Noise
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=49168
Printed Date: April-29-2024 at 2:09am
Topic: Water Pump Noise
Posted By: TG3
Subject: Water Pump Noise
Date Posted: August-31-2020 at 9:19pm
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I just replaced my water pump with a rebuilt unit. Pumps great, engine temp running nice and cool. It makes a noise that the old one didn’t, very hard to describe, not a click more like a swoosh and it is very rhythmic. I took a close look at it and it is cocked slightly to the to the left (if you are facing the bow of the boat) so the pulley is misaligned with the belt slightly. I think this is what is causing the noise. See attached picture, I think it is this bolt (Circled in red) on the pump body that is causing it not to sit correctly against the brackets. Is there supposed to be a spacer washer or something between the pump body and the bracket? Old pump didn’t have anything spacing it, but I also didn’t notice if it was misaligned. Any ideas?  ------------- 1997 Air/Sport Nautique |
Replies:
Posted By: GottaSki
Date Posted: August-31-2020 at 9:34pm
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Perhaps the pulley diameter is different or belt is wrong size? ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: Gary S
Date Posted: August-31-2020 at 9:50pm
For some reason they all sit like that,I have 3, even the old 302 carburetor ones. I'm sure someone will come along and tell you that you should shim it straight but there has to be thousands like that. If you think it's the bolt maybe you can grind the head thinner. Don't know whats causing the noise...... ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: Hollywood
Date Posted: August-31-2020 at 10:49pm
| Couple options, use a tooth style lock washer or a serrated flange bolt (might even be thicker?) |
Posted By: SNobsessed
Date Posted: September-01-2020 at 7:45am
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Mine was the same way. I put in an extra washer to shim it straight. Just OCD on alignments. As far as the noise, does the pump feel consistent when rotated by hand? Maybe impeller was molded off center a little. Probably will wear in eventually. ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: 8122pbrainard
Date Posted: September-01-2020 at 8:05am
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Trey, Do check the alignment and see if that makes a difference with the sound. (it sould be aligned anyway)  How tight do you have the belt? Too tight? ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: TG3
Date Posted: September-01-2020 at 9:02am
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I don't remember the pump being noisy when I spun it by hand before installing it, I will take the belt off and try it. I guess I assumed since it was a fresh rebuild it would be fine. How tight should the belt be? If I push it around the center in between the pulleys it deflects about 1/2". ------------- 1997 Air/Sport Nautique |
Posted By: 8122pbrainard
Date Posted: September-01-2020 at 9:33am
Sounds good. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
TG3 wrote:Posted By: Gary S
Date Posted: September-01-2020 at 11:15am
What I suspect Pete that the rebuilder used a lesser quality bearing. When I rebuilt those 3,2 I sourced all the parts individually. The 3rd I bought a kit. The kit bearings only had the numbers on them no manufactures. When compared to the other 2's NTN's the bearings turned noticeably rougher. This was of course before the seals were installed,that seems to mask anything. I just did one for Zach and his Barefoot,he bought the kit from here https://www.staycoolpumps.com/index.html" rel="nofollow - www.staycoolpumps.com/index.html It seemed like a quality kit- maybe even sourced from where Sherwood gets theirs but all in generic packaging. No feed back from end user but was assured I would receive a 5 star rating  ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: TG3
Date Posted: September-01-2020 at 2:08pm
I have contacted the rebuilder and he said if indicators point to the bearings he would replace it, so that is good. He is willing to work with me. ------------- 1997 Air/Sport Nautique |
Posted By: TG3
Date Posted: September-01-2020 at 2:11pm
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The rebuilder was Raw Pumps LLC. He had good ratings. ------------- 1997 Air/Sport Nautique |
Posted By: TG3
Date Posted: September-08-2020 at 10:13am
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PROBLEM SOLVED: Went to the lake this weekend and while there did some investigating. Turns out that the noise is actually coming from my alternator. Pump is running smooth and quiet. The slight out of alignment doesn't appear to be enough to wear the belt abnormally. I will keep an eye on that just to be sure. Thanks to all for your help! ------------- 1997 Air/Sport Nautique |